linux-kernel - Re: [PATCH] soc: imx8m: Correct i.MX8MP UID fuse offset

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Date:   Tue, 9 Jun 2020 18:23:49 +0300
From:   Iuliana Prodan <iuliana.prodan@....com>
To:     Anson Huang <Anson.Huang@....com>, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        leonard.crestez@....com, abel.vesa@....com, l.stach@...gutronix.de,
        peng.fan@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: Re: [PATCH] soc: imx8m: Correct i.MX8MP UID fuse offset



On 6/9/2020 4:15 PM, Anson Huang wrote:
> Correct i.MX8MP UID fuse offset according to fuse map:
> 
> UID_LOW: 0x420
> UID_HIGH: 0x430
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>

If this patch corrects the imx8mp UID shouldn't have a Fixes tag?

> ---
>   drivers/soc/imx/soc-imx8m.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c
> index 7b0759a..0bc8314 100644
> --- a/drivers/soc/imx/soc-imx8m.c
> +++ b/drivers/soc/imx/soc-imx8m.c
> @@ -22,6 +22,8 @@
>   #define OCOTP_UID_LOW			0x410
>   #define OCOTP_UID_HIGH			0x420
>   
> +#define IMX8MP_OCOTP_UID_OFFSET		0x10
> +
>   /* Same as ANADIG_DIGPROG_IMX7D */
>   #define ANADIG_DIGPROG_IMX8MM	0x800
>   
> @@ -87,6 +89,8 @@ static void __init imx8mm_soc_uid(void)
>   {
>   	void __iomem *ocotp_base;
>   	struct device_node *np;
> +	u32 offset = of_machine_is_compatible("fsl,imx8mp") ?
> +		     IMX8MP_OCOTP_UID_OFFSET : 0;
>   
>   	np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp");
>   	if (!np)
> @@ -95,9 +99,9 @@ static void __init imx8mm_soc_uid(void)
>   	ocotp_base = of_iomap(np, 0);
>   	WARN_ON(!ocotp_base);
>   
> -	soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH);
> +	soc_uid = readl_relaxed(ocotp_base + OCOTP_UID_HIGH + offset);
>   	soc_uid <<= 32;
> -	soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW);
> +	soc_uid |= readl_relaxed(ocotp_base + OCOTP_UID_LOW + offset);
>   
>   	iounmap(ocotp_base);
>   	of_node_put(np);
>